【大学频道】北京大学量子材料科学中心呈献 | 中科院物理所翁红明教授
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图 | 翁红明教授
题 目：Prediction of Topological Materials: from physical intuition to routinely search
报告人：翁红明
单 位：中国科学院物理研究所
时 间：2019-04-10
地 点：北京大学量子材料科学中心
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报告摘要
Topological materials are solids with nontrivial topology in their electronic band structures. The periodical lattice
of atoms in solids limits the electrons in a compact reciprocal lattice space and leads to nontrivial band topology
in both insulators and metals, namely topological insulators and topological semimetals. Band inversion is an
intuitive picture for understanding the underlying physics since it is related with Berry phase and Berry curvature
of bands. How to find a material with nontrivial band topology had been a quite elusive and difficult task.
However, some exotic and abnormal physical phenomena related with nontrivial band topology have been
noticed and successfully applied for locating the exact topological materials, which includes a large band gap
two-dimensional TIs in ZrTe5, the first Dirac semimetal Na3Bi and the first Weyl semimetal TaAs. These
discoveries have greatly advanced the whole field of topological quantum states. Recently, the band inversion
have been found to be efficiently identified with symmetry indicators formed by irreducible representation of
bands at high symmetrical momenta, which can be calculated through first-principles. High throughput
calculation of known non-magnetic materials is thus performed and thousands compounds have been identified to
have nontrivial band topology for routinely search.
个人简介
Hongming Weng is a professor in the Institute of Physics, Chinese Academy of Sciences (IOP-CAS). He graduated and received Ph. D. from Nanjing university in 2005. Before he joined IOP-CAS in 2010, he worked as postdoc and assistant professor in Japan. His research interests include first-principle calculation methods, topological materials and magneto-optical properties. He has published more than 120 SCI papers and they have been cited more than 10000 times. He has received several awards, including “JSPS postdoc fellowship”, “Excellent Young Scientist Programme” from NSFC, “Nishina Asia Award” from Nishina Memorial Foundation and “Young Scientists Award” from CAS.
● 北京大学量子材料科学中心报告--卢海舟：Nonlinear Hall effect
● 北京大学量子材料科学中心报告--管习文：Gruneisen Parameters: origin, identity and quantum refrigeration
● 北京大学量子材料科学中心报告--杨乐仙：TrARPES Studies on Correlated Materials
● 北京大学量子材料科学中心报告--方辰：Topological invariants: classification and diagnosis
● 北京大学量子材料科学中心报告--江台章：Novel Properties of Single Layers of Transition Metal Dichalcogenides MX2
● 北京大学量子材料科学中心学术报告--陈锟：Diagrammatic Monte Carlo Approach for Effective Field Theory
● 北京大学量子材料科学中心学术报告--牛谦：Geometric Effects on Orbital Magnetism
● 北京大学量子材料科学中心学术报告--Sufei Shi：Revealing the Excitonic Complexes in BNE ncapsulated Monolayer WSe2
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